Additional NRVD-specific features in bold
Measurement functions	average power,pulse power,peakenvelope power AM,reflection,DC valtage (depending on sensor)
Frequency and level range	DC to40 GHz,100 pW to 30W 9 KHz to 3 GHz,200μV to 1000V (depending on sensor)
Probes and sensors Display	all NRV sensorsand URV5 probes LCD for digits,units,menu-guided operation and analog display,adjust-ablebacklighting
Display of results	single-channel(withoptional display of correction frequency) or dual-channel
Absolutereadout	W,dBm, V, dBμV,dBV
Relative readout NRV5,URV55	dB,%W or %V relative to astored reference value
Relative readout NRVD	dB,difference,percent and ratio,relafive to a stored reference value or to the second measurementchannel;VSWR,reflection coefficient,return loss in dB,AM modulation depth
Analog display Digital display and resolution	automaticor with selectable scale max.4(1/2) digits,resolution selectable(0.1/0.01/0.001dB)
Display filtering	averaging over1 to 512 readings to reduce display noise;manual or automatic setting dependingon measurement range and resolution
Displaynoise	see sensors from page 262/266
Measurementrate	see table below
Accuracyof URV55 (without sensor)
18 to 28℃ 10 to 40℃ 0 to50℃	±0.02 dB ±1 digit ±0.04 dB ±1 digit ±0.06dB ±1 digit
Accuracy of powerreadout
in W ( NRVS /D without sensors)	0.4%(0.3%)+1 digit(18 to 28℃) 0.9% (0.8%)+1 digit(10 to 40℃) 1.4% (1.3%)+1digit(0 to 50℃)
Zero adjustment	manualor via IEC/IEEE bus,duration apprax.4 s
Frequency responsecorrection	sensor-specific calibrationdata taken into account;numericalentry of test frequency (keyboard or via IEC/IEEE bus)or by frequency-proportionalDC voltage
Attenuation compensation	externalattenuation or gain taken into account;data entry via keyboard or IEC/IEEE bus,range±200 dB
Entry of reference value	measuredvalue on keystroke or numerical entry via keypad or IEC/IEEE bus
Reference impedance	for conversion between voltage andpower,automatic readout of reference impedance from sensor data memory or numericalentry via keyboard or IEC/IEEE bus(for RF probe)
Remote control	IEC625(IEEE 488),SCPI,control of all instrument functions
Interface functions	SH1,AH1,T6,L4,SR1,PL1,DC1,DT1,PP0,PP1
DC frequency input
URV55, NRVS NRVD Connector Input voltage range	standard option NRVD-B2 BNC ±12V, linear with selectable scale
DCoutput
URV 55, NRVS NRVD Connector Left-/right-hand full-scale value Accuracy Channels	standard option NRVD-B2 BNC,R out =1K Ω EMF proportional analogdisplay corresponding to 0/+3 V ±5 mV 1,2
Input/OutputOption NRVD-B2	2 simultaneous DC voltage outputs,DC frequencyinput,trigger input(TTL,active low),ready output(TTL,active high)
Sensor check source
URV55, NRVS NRVD Output power Frequency VSWR RF connector	option NRVS -B1 standard 1 mW ±0.7% 50 MHz 1.05, ≤ 1.03 N female
General data
Powersupply	115 V + 15/-22%(-15%) 47 TO 63(440)Hz; 230V +15/-22%, 47 to 63 Hz,13VA 100/120/220V±10%, 230V-6/+15%; 47to 400 Hz(25 VA)
Dimensions(W×H×D);weight	219mm×103 mm×350 mm;3.2 kg 219 mm×147 mm×350 mm;4.5 kg
Measurementtime in seconds(from trigger to output of (first byte) depending on filter setting
Resolution	Filter number